Q. What do you mean by Blocking Probability?
Blocking Probability:Blocking probability P is defined as probability that all the servers in system are busy. When all servers are busy, no further traffic can be carried by system and arriving subscribers' traffic is blocked. At the first glance, it may appear that blocking probability is the same measure as GOS. Probability that all servers are busy may well represent the fraction of calls lost, which is what GOS is all about.